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Vulnerability of BusyBox: denial of service via huft_build

Synthesis of the vulnerability 

An attacker can generate a fatal error via huft_build() of BusyBox, in order to trigger a denial of service.
Vulnerable products: BusyBox, Debian, Ubuntu.
Severity of this weakness: 2/4.
Creation date: 27/07/2018.
Références of this bulletin: CVE-2015-9261, DLA-1445-1, DLA-1445-2, DLA-1445-3, DLA-2559-1, USN-3935-1, VIGILANCE-VUL-26856.

Description of the vulnerability 

An attacker can generate a fatal error via huft_build() of BusyBox, in order to trigger a denial of service.
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This weakness impacts software or systems such as BusyBox, Debian, Ubuntu.

Our Vigil@nce team determined that the severity of this vulnerability announce is medium.

The trust level is of type confirmed by the editor, with an origin of document.

An attacker with a expert ability can exploit this threat bulletin.

Solutions for this threat 

BusyBox: version 1.27.2.
The version 1.27.2 is fixed:
  https://git.busybox.net/

Debian 8: new busybox packages.
New packages are available:
  Debian 8: busybox 1:1.22.0-9+deb8u4

Debian 9: new busybox packages.
New packages are available:
  Debian 9: busybox 1:1.22.0-19+deb9u1

Ubuntu: new busybox packages.
New packages are available:
  Ubuntu 18.10: busybox 1:1.27.2-2ubuntu4.1
  Ubuntu 18.04 LTS: busybox 1:1.27.2-2ubuntu3.2
  Ubuntu 16.04 LTS: busybox 1:1.22.0-15ubuntu1.4
  Ubuntu 14.04 LTS: busybox 1:1.21.0-1ubuntu1.4
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Computer vulnerabilities tracking service 

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